2153522213 has 4 divisors (see below), whose sum is σ = 2154629100. Its totient is φ = 2152415328.

The previous prime is 2153522191. The next prime is 2153522221. The reversal of 2153522213 is 3122253512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1014932164 + 1138590049 = 31858^2 + 33743^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153522213 - 2¹⁴ = 2153505829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153522113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550520 + ... + 554417.

It is an arithmetic number, because the mean of its divisors is an integer number (538657275).

Almost surely, 2^2153522213 is an apocalyptic number.

It is an amenable number.

2153522213 is a deficient number, since it is larger than the sum of its proper divisors (1106887).

2153522213 is a wasteful number, since it uses less digits than its factorization.

2153522213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106886.

The product of its digits is 3600, while the sum is 26.

The square root of 2153522213 is about 46406.0579342827. The cubic root of 2153522213 is about 1291.3673007302.

Adding to 2153522213 its reverse (3122253512), we get a palindrome (5275775725).

The spelling of 2153522213 in words is "two billion, one hundred fifty-three million, five hundred twenty-two thousand, two hundred thirteen".